Wood-grinding machine.



2 Sheets-$heat 2.

Patented May 6, I902.

H. WEGERER. WOOD GRINDING MACHINE,

(Application filed Nov. 2, 1900.)

(No Model.)

UNTTED STATES PATENT OFFICE.

IIERMANN YVEGERER, OF GLOGGNITZ, AUSTRIA-HUNGARY.

WOOD-GRINDING MACHINE.

SPECIFICATION forming part of Letters Patent Noa 699,600, dated May 6, 1902. Application filed November 2,1900. Serial No. 35,283. (No model.)

T0 ctZZ whom it may concern:

Be it known that I, HERMANN WEGERER, a subject of the Emperor of Austria-Hungary, residing at Gloggnitz,in the Province of Lower Austria, in the Empire of Austria-Hungary, have invented certain new and useful Improvements in WVood-Grindin g Machines,with Conical Runner for Making WVood-Pulp; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters and figures of reference marked thereon, which form a part of this specification.

My invention has relation to machines for grinding wood into fiber for the manufacture of paper-pulp; and it has for its object a construction of machine whereby large masses of fiber can be economically produced.

The invention has for its further object the provision of means whereby a number of blocks of wood may be piled in each of a multiplicity of receptacles or boxes grouped about a revoluble grinding-stone, so that the grain of the wood will lie longitudinally relatively to the periphery of the stone, the provision of means whereby the blocks of wood are automatically fed to said stone, the provision of means supplying water in jets to the periphery of the stone, and the provision of means whereby access is had to the stone for dressing or cleansing the same or for any other purpose without necessitating its removal from the machine; but that my invention may be fully understood I will describe the same in detail, reference being had to the accompanying drawings, in which- Figure 1 is a vertical sectional view of so much of a wood-grinding machine as will be necessary to an illustration and an understanding of my invention. Fig. 2 is a fragmentary sectional top plan view thereof. Fig. 3 is a fragmentary vertical section, and Fig. 4 is a more or less diagrammatic view illustrating the grouping of the receptacles for the wood about the axis of the stone.

As shown in Fig. 1, the base m of the machine has a depression to form a receptacle for the mixture of ground fiber and water, which may be drawn off from time to time through a suitable normally closed drain. (Not shown.) To the rim q of said base are bolted wedge-shaped or sectoral frames t, ar-

ranged so that their proximate vertical walls form oblong rectangular spaces in groups of four such spaces-for instance, on opposite sides of the axis of the machine-as shown in Fig. 4, for the reception of parallelepipedal boxes r open at their inner end and having a charging-aperture in their upper wall closable by a cover s, held normally closed by a latch or other device, as shown in Fig. 2. These boxes r are bolted to the vertical walls of the sectoral spacing-frames i by means of bolts a and 1;, Figs. 1 and 2, and said boxes are provided with an opening in their vertical outer wall through which extends the rod .2 of a piston 10, whose inner face is toothed, so as to engage the blocks of wood placed transversely in said boxes, hence tangential to the circle described by the periphery of the stone presently to be referred to.

To the outer wall of each box 0 is bolted a guide m for the piston-rod 2, said guide being slotted at a suitable point.

The piston-rods z are constructed in the form of rack-bars, each being geared to a pinion 9, arranged to revolve in the aforesaid slot, said pinion being secured to a spindle 4, which has its bearings in arms on, also socured to or formed on and projecting from the outer vertical wall of the box 1" on opposite sides of the guide a. To the spindle 4 is secured a drum 5, adapted to be rotated by hand, and to said drum is secured one end of a rope 6, wound thereon and having a weight or weights g connected to its opposite end. To the spindle 4 is also secured a ratchetwheel 7, engaged by a pawl, (not shown,) and which in practice is pivoted to the bearingarm :0 proximate to said ratchet-wheel, so that when the rope 6 is wound up it is pre Vented from unwinding and moving the piston to inwardly during the charging of the boxes 1' with wood or when the machine is idle.

From the described arrangement it will readily be seen that when the pawl is disengaged from the ratchet 7 the drum 5 and pinion 4will be revolved from right to leftunder the action of the load y, so that when the blocks of wood are ground up the piston 10 on the rope.

will be at the limit of its inward movement. It now the pawl is thrown into engagement with said ratchet and the drum rotated from left to right, the rope 6 will be wound on drum 5 and the piston it) moved back to the outer end of its box, where it will be held by the pawl against movement under the strain As shown of the sectoral frames it constitute the vertical wall of a housing which is closed at top by a hood or cover k, bolted to said vertical wall and to the inner end ofthe boxes, so that the latter can be charged from without the housing, which for certain purposes-as, for instance, when hot water or steam is usedcan be hermetically closed and the escape therefrom of vapor effectually prevented.

The fluid, cold or hot, is supplied to the grinding-chamber by means of a perforated pipe 3, Figs. 2 and 3, arranged in a recess in the inner wall 2! of the sectoral frames t and extending out through the rim flange of cover 70.

The machine is supported from girders p, and in cover 712 is formed a bearing l and in the base or bottom m a bearing '71, in which to which flange the stone is secured by means of tie-rods h, extending through a disk g in the upper face of said stone, which latter is held against vertical displacement by a nut 'i, threaded on shaft b, the threads on the latter winding in a direction opposite to the direction of rotation of the stone at. Above the nut 71 the shaft 19 carries a cup 0 for catching surplus lubricant and preventing access thereof to the stone and to the fibrous material in the receptacle below the stone.

The stone ahas the form of an inverted truncated cone, so as to constantly bear on the blocks of Wood pressed against it by the piston to.

For the purpose of lengthening the boxes 1" in accordance with the wear of the stone at and also for the purpose of preventing chips from being carried around by the stone and into the fiber-receptacle below the same each box r is provided with a plate 1, adjustable longitudinally along one of the vertical walls of said box on the fastening-bolts u, of which there are preferably three, said bolts and the bolts 11, as hereinabove stated, serving also to secure the boxes to the vertical walls of the spacing-frames t, the plates 1 having longitudinal slots 2, (see Fig. 2,) in which the heads of the bolts are countersunk, so as not to project from the inner face of said plates, the heads of bolts 1) being countersunk, so as not to project from the inner face of the opposite vertical wall of a box, as shown in Fig. 2 for obvious reasons. By the described arrangement the plates 1 can readily be adjusted inwardly from without by loosening the nuts on in Fig. 2, the inner narrower ends the bolts, then sliding the plate inwardly, access thereto being had through the chargingaperture, and again locking said plate into position after adjustment by screwing up the nuts.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is

1. A wood-grinding machine, comprisinga cylindrical housing, a multiplicity of parallelepipedal boxes for the reception of the wood to be ground, disposed in the vertical walls of said housing and projecting radially therefrom, said boxes open at their inner ends, a feed-piston in each of said boxes'having a toothed rod, a vertical shaft revoluble in axially-disposed hearings in the base and cover of the housing and a grinding-stone of the form of an inverted truncated cone secured to said shaft; in combination with a spindle revoluble in bearings in bracket-arms secured to the outer face of each box, a pinion secured to said spindle and gearing with the toothed piston-rod, a rope-drum also secured to said spindle and a weighted rope wound on said drum to revolve the pinion so as to move the/piston inwardly, substantiallyas set forth.

2. A wood-grinding machine comprising a cylindrical housing, a multiplicity of parallelepipedal boxes for the reception of the wood to be ground, disposed in the vertical walls of said housing and projecting radially therefrom, said boxes open at their inner ends, a feed-piston in each of said boxes having a toothed rod, a vertical shaft revoluble in axially-disposed bearings in the base and cover of the housing and a grinding-stone of the form of an inverted truncated cone secured to said shaft; in combination with a spindle revoluble in bearings in bracket-arms securedto the outer face of each box, a pinion secured to said spindle and gearing with the toothed piston-rod, a rope-drum also securedto said spindle, a weighted rope wound on said drum to revolve the pinion so as tomove the piston inwardly and means for revolving the drum by hand in a reverse direction and locking the same against rotation, substantially as and for the purpose set forth.

3. A wood-grinding machine comprising a circular base, a plurality of sectoral frames removably secured thereto so as to form between them reotangular open-ended spaces, the inner, narrower ends of said frames con-- stituting the vertical wall of the housing, one or more of the inner ends of the frames of each group having a vertical recess for the reception of a perforated pipe, a parallelepipedal box for the Wood to be ground removably secured to the base of the housing and to proximate walls of the frames in the spaces between them, said boxes open at their inner" end and having a closable charging-aperturein their upperwall anda hood or cover bolted to the inner end of the sectoral frames and boxes in combination with a vertical shaft revoluble in bearings in the cover and base of the housing, a grinding-stone of the form of a truncated cone secured to said shaft with its periphery proximate to the inner end of the aforesaid boxes, and means for automatically feeding the wood in the boxes to the stone, for the purposes set forth.

4. A wood-grinding machine, comprising a circular base provided with a depression for the collection of the fiber, a plurality of sectoral frames removably secured thereto so as and to proximate Walls of the frames in the spaces between them, said boxes open at their inner end and having a closable chargingaperture in their upper wall and a hood or cover bolted to the inner end of the sectoral frames and boxes; in combination with a vertical shaft revoluble in bearings in the cover and base of the housing, a grinding-stone of the form of a truncated cone secured to said shaft'with its periphery proximate to the inner end of the aforesaid boxes, and means for automatically feeding the wood'in the boxes to the stone, for the purpose set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing Witnesses.

HERMANN WEGERER.

Witnesses:

J OSEF RUBARCH, ALVESTO S. HOGUE. 

